Opscode Chef knife plug-in for OpenStack
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Knife OpenStack

This is the official Opscode Knife plugin for OpenStack Compute (Nova). This plugin gives knife the ability to create, bootstrap and manage instances in OpenStack Compute clouds. It has been tested against the Diablo and Essex releases in configurations using Keystone against the OpenStack API (as opposed to the EC2 API).

Please refer to the CHANGELOG.md for version history and known limitations. If you are using Floating IP addresses, please refer to the "Working with Floating IPs" section below.


Be sure you are running the latest version Chef. Versions earlier than 0.10.0 don't support plugins:

$ gem install chef

This plugin is distributed as a Ruby Gem. To install it, run:

$ gem install knife-openstack

Depending on your system's configuration, you may need to run this command with root privileges.


In order to communicate with an OpenStack Compute cloud's OpenStack API you will need to tell Knife your OpenStack Compute API endpoint, your Dashboard username and password (tenant is optional). The easiest way to accomplish this is to create these entries in your knife.rb file:

knife[:openstack_username] = "Your OpenStack Dashboard username"
knife[:openstack_password] = "Your OpenStack Dashboard password"
### Note: If you are not proxying HTTPS to the OpenStack auth port, the scheme should be HTTP
knife[:openstack_auth_url] = "http://cloud.mycompany.com:5000/v2.0/tokens"
knife[:openstack_tenant] = "Your OpenStack tenant name"

If your knife.rb file will be checked into a SCM system (ie readable by others) you may want to read the values from environment variables:

knife[:openstack_username] = "#{ENV['OS_USERNAME']}"
knife[:openstack_password] = "#{ENV['OS_PASSWORD']}"
knife[:openstack_auth_url] = "#{ENV['OS_AUTH_URL']}"
knife[:openstack_tenant] = "#{ENV['OS_TENANT_NAME']}"

You also have the option of passing your OpenStack API Username/Password into the individual knife subcommands using the -A (or --openstack-username) -K (or --openstack-password) command options

# provision a new image named kb01
knife openstack server create -A 'MyUsername' -K 'MyPassword' --openstack-api-endpoint 'http://cloud.mycompany.com:5000/v2.0/tokens' -f 1 -I 13 -S trystack -i ~/.ssh/trystack.pem -r 'role[webserver]'

Additionally the following options may be set in your knife.rb:

  • flavor
  • image
  • openstack_ssh_key_id
  • template_file

Working with Floating IPs

To use a floating IP address while bootstrapping nodes, use the -a or --floating-ip option. For the node to have the floating IP address after bootstrapping, it is required to use the new openstack.rb Ohai plugin, waiting for the next Ohai release or installed using the ohai cookbook. https://github.com/mattray/ohai/tree/OHAI-381 is the ticket for this.


This plugin provides the following Knife subcommands. Specific command options can be found by invoking the subcommand with a --help option.

knife openstack server create

Provisions a new server in an OpenStack Compute cloud and then perform a Chef bootstrap (using the SSH protocol). The goal of the bootstrap is to get Chef installed on the target system so it can run Chef Client with a Chef Server. The main assumption is a baseline OS installation exists (provided by the provisioning). It is primarily intended for Chef Client systems that talk to a Chef server. By default the server is bootstrapped using the chef-full template (default after the 10.10 release). This may be overridden using the -d or --template-file command options. If you do not have public IP addresses, use the --private-network option to use the private IP address for bootstrapping.

knife openstack server delete

Deletes an existing server in the currently configured OpenStack Compute cloud account. If a floating IP address has been assigned to the node, it is disassociated automatically by the OpenStack server. PLEASE NOTE - this does not delete the associated node and client objects from the Chef server without using the -P option to purge the client.

knife openstack server list

Outputs a list of all servers in the currently configured OpenStack Compute cloud account. PLEASE NOTE - this shows all instances associated with the account, some of which may not be currently managed by the Chef server.

knife openstack flavor list

Outputs a list of all available flavors (available hardware configuration for a server) available to the currently configured OpenStack Compute cloud account. Each flavor has a unique combination of virtual cpus, disk space and memory capacity. This data can be useful when choosing a flavor id to pass to the knife openstack server create subcommand.

knife openstack image list

Outputs a list of all available images available to the currently configured OpenStack Compute cloud account. An image is a collection of files used to create or rebuild a server. This data can be useful when choosing an image id to pass to the knife openstack server create subcommand.


Author:: Seth Chisamore (schisamo@opscode.com)

Author:: Matt Ray (matt@opscode.com)

Copyright:: Copyright (c) 2011-2012 Opscode, Inc.

License:: Apache License, Version 2.0

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at


Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.